Alert archive / Texas / Flash Flood Watches in 2021
Flash Flood Watch 4, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood watch at May 17, 2021, 1:56 PM CDT for 4 states. It took effect at May 18, 2021, 7:00 AM CDT. It was in force for 4 days.
The area
The counties it named.
The facts
- Issued
- May 17, 2021, 1:56 PM CDT (18:56 UTC)
- In effect from
- May 18, 2021, 7:00 AM CDT
- Expired
- May 22, 2021, 2:50 AM CDT
- In force
- 4 days
- Issued by
- NWS Shreveport, LA
- Flood severity
- None
All 43 counties
Columbia County, AR, Hempstead County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Sevier County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Webster Parish, LA, Winn Parish, LA, McCurtain County, OK, Angelina County, TX, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Red River County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 30 km from the middle of the area, began a volume at 18:59 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 6.9 hours before the alert went out and 34 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 269 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 462 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 168 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
886 WGUS64 KSHV 171856 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 156 PM CDT Mon May 17 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-181900- /O.NEW.KSHV.FF.A.0004.210518T1200Z-210520T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 156 PM CDT Mon May 17 2021 ...FLASH FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH THURSDAY MORNING... The National Weather Service in Shreveport has issued a * Flash Flood Watch for portions of southwest Arkansas...Louisiana... southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * From Tuesday morning through Thursday morning * Rainfall totals of 2 to 6 inches with isolated higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 19
11 follow-up statements
718 WGUS64 KSHV 180903 FFASHV Flood Watch National Weather Service Shreveport LA 403 AM CDT Tue May 18 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-181715- /O.CON.KSHV.FF.A.0004.210518T1200Z-210520T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Sabine-Natchitoches-Winn-Grant- McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-Nacogdoches- Shelby-Angelina-San Augustine- Including the cities of De Queen, Nashville, Mineral Springs, Dierks, Ashdown, Hope, Prescott, Texarkana, Stamps, Lewisville, Bradley, Magnolia, Shreveport, Bossier City, Minden, Springhill, Homer, Haynesville, Ruston, Mansfield, Stonewall, Logansport, Coushatta, Martin, Arcadia, Ringgold, Gibsland, Jonesboro, Many, Zwolle, Pleasant Hill, Natchitoches, Winnfield, Colfax, Montgomery, Dry Prong, Idabel, Broken Bow, Clarksville, Bogata, Mount Vernon, Mount Pleasant, Pittsburg, Daingerfield, Lone Star, Naples, Omaha, Atlanta, Linden, Hughes Springs, Queen City, Mineola, Winnsboro, Quitman, Hawkins, Gilmer, Big Sandy, Jefferson, Tyler, Longview, Marshall, Jacksonville, Rusk, Henderson, Carthage, Nacogdoches, Center, Lufkin, San Augustine, Hemphill, and Pineland 403 AM CDT Tue May 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THURSDAY MORNING... The Flash Flood Watch continues for * Portions of southwest Arkansas, Louisiana, southeast Oklahoma, and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada, and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster, and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur, and Wood. * From 7 AM CDT this morning through Thursday morning * Additional rainfall totals of 2 to 5 inches with isolated higher amounts in excess of 6 inches possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 33
978 WGUS64 KSHV 182041 FFASHV Flood Watch National Weather Service Shreveport LA 341 PM CDT Tue May 18 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-191200- /O.CON.KSHV.FF.A.0004.000000T0000Z-210520T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 341 PM CDT Tue May 18 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING... The Flash Flood Watch continues for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Through Thursday morning * Additional rainfall totals of 2 to 5 inches with isolated higher amounts in excess of 6 inches possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 20
214 WGUS64 KSHV 190921 FFASHV Flood Watch National Weather Service Shreveport LA 421 AM CDT Wed May 19 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-191730- /O.CON.KSHV.FF.A.0004.000000T0000Z-210520T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Sabine-Natchitoches-Winn-Grant- McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-Nacogdoches- Shelby-Angelina-San Augustine- Including the cities of De Queen, Nashville, Mineral Springs, Dierks, Ashdown, Hope, Prescott, Texarkana, Stamps, Lewisville, Bradley, Magnolia, Shreveport, Bossier City, Minden, Springhill, Homer, Haynesville, Ruston, Mansfield, Stonewall, Logansport, Coushatta, Martin, Arcadia, Ringgold, Gibsland, Jonesboro, Many, Zwolle, Pleasant Hill, Natchitoches, Winnfield, Colfax, Montgomery, Dry Prong, Idabel, Broken Bow, Clarksville, Bogata, Mount Vernon, Mount Pleasant, Pittsburg, Daingerfield, Lone Star, Naples, Omaha, Atlanta, Linden, Hughes Springs, Queen City, Mineola, Winnsboro, Quitman, Hawkins, Gilmer, Big Sandy, Jefferson, Tyler, Longview, Marshall, Jacksonville, Rusk, Henderson, Carthage, Nacogdoches, Center, Lufkin, San Augustine, Hemphill, and Pineland 421 AM CDT Wed May 19 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING... The Flash Flood Watch continues for * Portions of southwest Arkansas, Louisiana, southeast Oklahoma, and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada, and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster, and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur, and Wood. * Through Thursday morning * Additional rainfall totals of 1 to 2 inches with isolated higher amounts of 3 inches or more possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 33
584 WGUS64 KSHV 191932 FFASHV Flood Watch National Weather Service Shreveport LA 232 PM CDT Wed May 19 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-201200- /O.CON.KSHV.FF.A.0004.000000T0000Z-210520T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 232 PM CDT Wed May 19 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY MORNING... The Flash Flood Watch continues for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Through Thursday morning * Additional rainfall totals of 1 to 2 inches, with isolated higher amounts of 3 inches or more possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$
388 WGUS64 KSHV 200804 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 304 AM CDT Thu May 20 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-201615- /O.EXT.KSHV.FF.A.0004.000000T0000Z-210521T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 304 AM CDT Thu May 20 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS EVENING... The Flash Flood Watch is now in effect for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Through this evening * Rainfall totals of 1 to 2 inches, with isolated locally higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 33
328 WGUS64 KSHV 201842 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 142 PM CDT Thu May 20 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-210245- /O.EXT.KSHV.FF.A.0004.000000T0000Z-210521T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Sabine-Natchitoches-Winn-Grant- McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur- Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola-Nacogdoches- Shelby-Angelina-San Augustine- Including the cities of De Queen, Nashville, Mineral Springs, Dierks, Ashdown, Hope, Prescott, Texarkana, Stamps, Lewisville, Bradley, Magnolia, Shreveport, Bossier City, Minden, Springhill, Homer, Haynesville, Ruston, Mansfield, Stonewall, Logansport, Coushatta, Martin, Arcadia, Ringgold, Gibsland, Jonesboro, Many, Zwolle, Pleasant Hill, Natchitoches, Winnfield, Colfax, Montgomery, Dry Prong, Idabel, Broken Bow, Clarksville, Bogata, Mount Vernon, Mount Pleasant, Pittsburg, Daingerfield, Lone Star, Naples, Omaha, Atlanta, Linden, Hughes Springs, Queen City, Mineola, Winnsboro, Quitman, Hawkins, Gilmer, Big Sandy, Jefferson, Tyler, Longview, Marshall, Jacksonville, Rusk, Henderson, Carthage, Nacogdoches, Center, Lufkin, San Augustine, Hemphill, and Pineland 142 PM CDT Thu May 20 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 1 AM CDT FRIDAY... The Flash Flood Watch is now in effect for * Portions of southwest Arkansas, Louisiana, southeast Oklahoma, and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada, and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster, and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur, and Wood. * Until 1 AM CDT Friday * Rainfall totals of 1 to 2 inches, with isolated locally higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 50
291 WGUS64 KSHV 210236 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 936 PM CDT Thu May 20 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-211045- /O.EXT.KSHV.FF.A.0004.000000T0000Z-210521T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 936 PM CDT Thu May 20 2021 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 7 AM CDT FRIDAY... The Flash Flood Watch is now in effect for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Until 7 AM CDT Friday * Rainfall totals of 1 to 3 inches, with isolated higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 24
541 WGUS64 KSHV 210750 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 250 AM CDT Fri May 21 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-220000- /O.EXT.KSHV.FF.A.0004.000000T0000Z-210522T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 250 AM CDT Fri May 21 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH THIS EVENING... The Flash Flood Watch is now in effect for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Through this evening * Rainfall totals of 1 to 3 inches, with isolated higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 16
019 WGUS64 KSHV 211950 FFASHV URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Shreveport LA 250 PM CDT Fri May 21 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-017>020-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-220400- /O.EXT.KSHV.FF.A.0004.000000T0000Z-210522T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Sabine-Natchitoches-Winn-Grant-McCurtain-Red River- Bowie-Franklin-Titus-Camp-Morris-Cass-Wood-Upshur-Marion-Smith-Gregg- Harrison-Cherokee-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Colfax, Hawkins, Ashdown, Center, Carthage, Magnolia, Ruston, Gibsland, Winnsboro, Montgomery, Stamps, Jefferson, Pleasant Hill, Mineola, Springhill, Naples, Hope, Henderson, Linden, Nacogdoches, Bossier City, Broken Bow, Zwolle, Hughes Springs, Gilmer, Nashville, San Augustine, Mount Pleasant, Lone Star, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Queen City, Atlanta, Quitman, Mount Vernon, Minden, Homer, Rusk, Arcadia, Natchitoches, Omaha, De Queen, Pineland, Many, Dry Prong, Stonewall, Clarksville, Martin, Prescott, Big Sandy, Ringgold, Texarkana, Daingerfield, Bogata, Pittsburg, Marshall, Haynesville, Winnfield, Jacksonville, Bradley, Tyler, Logansport, Hemphill, Dierks, Lufkin, Idabel, and Longview 250 PM CDT Fri May 21 2021 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH SATURDAY MORNING... The Flash Flood Watch is now in effect for * Portions of southwest Arkansas...Louisiana...southeast Oklahoma and Texas, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Sabine, Webster and Winn. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Through Saturday morning * Additional rainfall totals of 1 to 2 inches, with isolated higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 20
038 WGUS64 KSHV 220233 FFASHV Flood Watch National Weather Service Shreveport LA 933 PM CDT Fri May 21 2021 ARZ050-051-059>061-070>072-LAZ001>005-010>013-018>020-220345- /O.CAN.KSHV.FF.A.0004.000000T0000Z-210522T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-Red River- Bienville-Jackson-Natchitoches-Winn-Grant- Including the cities of Colfax, Ashdown, Magnolia, Ruston, Gibsland, Montgomery, Stamps, Springhill, Hope, Bossier City, Nashville, Lewisville, Mineral Springs, Mansfield, Coushatta, Shreveport, Jonesboro, Minden, Homer, Arcadia, Natchitoches, De Queen, Dry Prong, Stonewall, Martin, Prescott, Ringgold, Texarkana, Haynesville, Winnfield, Bradley, Logansport, and Dierks 933 PM CDT Fri May 21 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of southwest Arkansas and Louisiana, including the following areas, in southwest Arkansas, Columbia, Hempstead, Howard, Lafayette, Little River, Miller, Nevada and Sevier. In Louisiana, Bienville, Bossier, Caddo, Claiborne, De Soto, Grant, Jackson, Lincoln, Natchitoches, Red River, Webster and Winn has been cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ LAZ017-OKZ077-TXZ096-097-108>112-124>126-136>138-149>153-165>167- 221200- /O.CON.KSHV.FF.A.0004.000000T0000Z-210522T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sabine-McCurtain-Red River-Bowie-Franklin-Titus-Camp-Morris-Cass- Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola- Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Hawkins, Center, Carthage, Mount Pleasant, Clarksville, Winnsboro, Jefferson, Pleasant Hill, Mineola, Hughes Springs, Naples, Henderson, Linden, Nacogdoches, Broken Bow, Daingerfield, Gilmer, Lone Star, Queen City, Atlanta, Quitman, Mount Vernon, Idabel, Rusk, Omaha, Zwolle, Many, Pineland, Lufkin, Big Sandy, Texarkana, Bogata, Pittsburg, Marshall, Jacksonville, Tyler, Hemphill, San Augustine, and Longview 933 PM CDT Fri May 21 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT SATURDAY... The Flash Flood Watch continues for * Portions of northwest Louisiana...southeast Oklahoma and Texas, including the following areas, in northwest Louisiana, Sabine. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood. * Until 7 AM CDT Saturday * Rainfall totals of 1 to 2 inches, with isolated higher amounts possible. * Flooding may occur in urban and poor drainage areas. Heavy rainfall may also cause flooding of creeks, streams, and rivers. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to Flash Flooding. Flash Flooding is a very dangerous situation. You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ 24
862 WGUS64 KSHV 220750 FFASHV Flood Watch National Weather Service Shreveport LA 250 AM CDT Sat May 22 2021 LAZ017-OKZ077-TXZ096-097-108>112-124>126-136>138-149>153-165>167- 220900- /O.CAN.KSHV.FF.A.0004.000000T0000Z-210522T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sabine-McCurtain-Red River-Bowie-Franklin-Titus-Camp-Morris-Cass- Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola- Nacogdoches-Shelby-Angelina-San Augustine-Sabine- Including the cities of Hawkins, Center, Carthage, Mount Pleasant, Clarksville, Winnsboro, Jefferson, Pleasant Hill, Mineola, Hughes Springs, Naples, Henderson, Linden, Nacogdoches, Broken Bow, Daingerfield, Gilmer, Lone Star, Queen City, Atlanta, Quitman, Mount Vernon, Idabel, Rusk, Omaha, Zwolle, Many, Pineland, Lufkin, Big Sandy, Texarkana, Bogata, Pittsburg, Marshall, Jacksonville, Tyler, Hemphill, San Augustine, and Longview 250 AM CDT Sat May 22 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northwest Louisiana... southeast Oklahoma and Texas, including the following areas, in northwest Louisiana, Sabine. In southeast Oklahoma, McCurtain. In Texas, Angelina, Bowie, Camp, Cass, Cherokee, Franklin, Gregg, Harrison, Marion, Morris, Nacogdoches, Panola, Red River, Rusk, Sabine, San Augustine, Shelby, Smith, Titus, Upshur and Wood has been cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ 16
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before this flash flood watch went out at May 17, 12:51 PM CDT, 1 hour 5 minutes earlier.
Area forecast discussion, May 17, 12:51 PM CDT, 1 hour 5 minutes before
Area Forecast Discussion National Weather Service Shreveport LA 1251 PM CDT Mon May 17 2021 .AVIATION... For 17/18Z TAF period, convection continues to gradually spread east from our East Texas sites into SHV/TXK early this afternoon. This trend will continue at ELD/MLU by mid to late afternoon as a weak upper level disturbance shifts farther east across the region this afternoon. Cigs/vsbys will generally remain in the IFR/MVFR range through much of the period as low-level moisture continues to remain abundant. Convection will wane areawide by this evening and overnight before eventually returning across East Texas by mid to late morning on Tuesday. Cigs will likely deteriorate further toward the end of the period with IFR and possibly intermittent LIFR conditions occurring through Tuesday morning. S/SE winds are expected to prevail between 5-10 kts with occasional higher gusts. /19/ && .PREV DISCUSSION... /issued 1146 AM CDT Mon May 17 2021/ UPDATE... Convection continues to spread SE late this morning within an embedded shortwave across NE Texas. This upper disturbance will continue to provide the necessary lift and forcing to generate additional showers and thunderstorms as we move through this afternoon, especially across the SE half of the region. For the update this morning, did have to make some adjustments to hourly and max temperatures to better align with ongoing obs and trends thus far this morning. In general, this resulted in lowering max temps by a degree or two in most cases. Otherwise, the remainder of the forecast is on track. New updated text products have been issued. /19/ PREV DISCUSSION... /issued 414 AM CDT Mon May 17 2021/ SHORT TERM.../Today through Tuesday/ Radar imagery from early this morning is showing a few showers with some embedded thunderstorms across portions of deep east Texas, extending to the northeast through central Louisiana and then into northeast Louisiana. Additionally, there are a few showers moving across southwest Oklahoma as well. Expecting this activity to continue through the rest of the night and into the morning hours. Upper air analysis from this morning shows a well-defined low centered over the Nevada/Arizona/Utah state lines. Models show this upper-level low gradually pushing into the Four Corners Region through the day today. This feature has already sent one of many rounds of precipitation to the area, which we saw late Sunday and into last night. Showers and thunderstorms will begin to increase across the area late this morning and into the early afternoon hours. While the majority of the severe weather threat will remain well to our east, there is a chance for marginally severe thunderstorms generally west of a line from Natchitoches, LA north to near Prescott, AR were a Marginal Risk is currently painted for large hail and damaging winds. At the same time, stronger thunderstorms are expected to develop across western Texas and slowly move towards our area as we head into tonight. Showers and thunderstorms will continue to move through the area tonight and into the day Tuesday. Models indicate that there could be an ongoing MCS moving across central and north Texas early Tuesday morning that will track into our area. This could bring an additional threat of severe weather during the day Tuesday with all modes of severe weather possible. The area with the greatest chance of seeing severe weather on Tuesday will be across portions of east Texas where SPC currently has painted a Slight Risk. In addition to the severe weather chances across the area, there remains a good chance for moderate to heavy rainfall across the area. While most of the heaviest rain will hold off till later in the week, a few storms today and Tuesday will produce locally heavy rainfall. Will likely need a Flash Flood Watch by Tuesday afternoon, but will hold off and see what the 12z data indicates for start times. Temperatures today will range from the mid to upper 70s for areas along and north of I-30 to the lower 80s elsewhere. Low temperatures tonight will generally range from the mid to upper 60s. Look for afternoon high temperatures on Tuesday to range from the upper 70s to lower 80s once again. /33/ LONG TERM.../Tuesday Night through Sunday Night/ The closed low now entering the Desert SW this morning will open up over the next day or so as it enters the Cntrl/Srn Rockies Tuesday night, with the attendant upper trough now progged to dig a bit farther S into NCntrl Old MX. Strong diffluence will set up ahead of the trough over OK and much of Cntrl TX, with a 30-40kt Srly LLJ feeding low level moisture Nwd where one or multiple large clusters of convection will develop by late afternoon/into the evening while gradually migrating E into ECntrl TX/SE OK/possibly the adjacent sections of SW AR by daybreak Wednesday. Moderate MLCapes on the order of 2000-2500 J/Kg is progged to develop within the moist sector across Ncntrl/Cntrl and NE TX during the late afternoon/evening Tuesday, such that the developing convection will pose a svr threat with damaging winds/hail over these areas. This may translate ENE across the remainder of E TX and possibly Wrn LA overnight, although instability remains progged to wane during the late evening/overnight hours with the stabilizing bndry lyr. The primary threat will then transition to locally heavy rainfall, which looks to affect much of E TX/SE OK/adjacent sections of SW AR overnight, which will fall over nearly saturated grounds from heavy rainfall which fell late last weekend into the early portions of the week over much of E TX. Timing discrepancies do arise though with the 00Z progs with the GFS/Canadian/ECMWF a bit more progressive with the overnight MCS than the slower NAM, although the ECMWF suggests much lower QPF than earlier runs. Given the strength of the LLJ and timing consistencies with the majority of the 00Z progs with the earlier model runs, have not strayed much from the previous forecasts and have included heavy rain mention Tuesday night over the aforementioned areas, but did back off on the higher (likely/categorical) pops until after 06Z Wednesday for the Wrn half of the area given the potential slower evolution of the developing MCS. Have maintained likely/categorical pops Wednesday as the MCS marches E across the region although weakening during the afternoon as this complex outruns the area of best large scale forcing ahead of the upper trough to the W. Storm total QPF's through Wednesday night still looks to range from 3-5+ inches over E TX, SE OK, adjacent sections of SW AR and possibly Wrn LA, with isolated higher amounts in excess of 8 inches over portions of E TX. What's left of the upper level circulation of the trough should begin to lift N from Ern Co/OK and TX Panhandles into the Cntrl Plains, with the Srn portions of the residual trough over S TX progged to dig father S into Ern MX as it becomes pinched off from the main upper flow. This will come as upper ridging begins to amplify N from the SE CONUS into the OH Valley/into much of New England, which will act to shear apart the remainder of the Srn Plains/Ern MX trough Thursday through next weekend. The convection Wednesday should begin to gradually wane Wednesday night as the ridging to the E tries to advect some drier air back to the WNW. However, a deep SErly unidirectional flow around the Wrn periphery of the ridge coupled with diurnal heating should result in sct to numerous areas of convection developing once again areawide, where likely and categorical pops were maintained, especially across all but Scntrl AR/Ern sections of NCntrl LA. While this could result in localized pockets of heavy rain and training, especially over E TX, the ridge should begin to build a bit farther W through the Lower MS Valley Friday, thus maintaining more sct convection than the widespread which will be observed for much of this week. Disagreements arise with the extent of convection by late week into next weekend, with the GFS mostly dry during the period, whereas the ECMWF and to more extent the Canadian suggest more sct mainly diurnal convection over much of the region. Have remained more conservative with pops, lowering the much higher NBM pops down to chance while confining the mid/high chance pops over SE OK/E TX where the ridging may be weaker. Did lower pops to slight chance across the Ern zones Saturday given the model consensus, with a warming trend commencing by late week into the weekend as the ridge nudges farther W. Decent model agreement exists that by late weekend, any convection should be more isolated as the ridge retrogrades farther W into the Lower MS Valley. 15 && .PRELIMINARY POINT TEMPS/POPS... SHV 69 84 68 74 / 40 80 70 90 MLU 68 82 68 81 / 50 80 30 70 DEQ 65 79 65 74 / 60 90 90 90 TXK 68 81 68 74 / 40 80 80 90 ELD 65 82 67 77 / 40 80 50 80 TYR 68 82 66 76 / 40 90 90 90 GGG 67 82 67 75 / 40 90 80 90 LFK 69 83 68 77 / 30 80 70 90 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && 19/33/15
Hazardous weather outlook, May 17, 12:46 PM CDT, 1 hour 10 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 1246 PM CDT Mon May 17 2021 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-181100- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 1246 PM CDT Mon May 17 2021 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... Showers and thunderstorms will increase across the region today, ahead of an upper level disturbance that will move through the area. Isolated strong to severe thunderstorms can not be ruled out, with damaging winds, hail, and brief heavy rainfall possible. These showers and thunderstorms will diminish this evening with the departure of this disturbance. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday... Showers and thunderstorms will again return to the region Tuesday in advance of an upper level storm system that will progress through the Southern Rockies and into West Texas and the Oklahoma Panhandle by midweek. The threat for locally heavy rainfall and flash flooding will increase Tuesday night and Wednesday across East Texas, Southeast Oklahoma, portions of Southwest Arkansas and possibly Western Louisiana, as a complex of showers and thunderstorms moves into these areas. Some of these storms may also become severe during the late afternoon through the evening hours Tuesday, before the heavy rain and flash flood threat increases across these areas Tuesday night and Wednesday. Widespread rainfall amounts of three to five inches are expected this week across these areas this week, with isolated higher amounts in excess of eight inches possible, especially over East Texas. This rainfall will result in new rises and possible flooding on area creeks and bayous, rivers and lakes. This unsettled weather pattern will continue Thursday and Friday, before gradually diminishing from east to west this weekend. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel...amateur radio operators...and storm spotters may be needed today across portions of the region. 09
In the hours before
Local storm report, May 17, 11:18 AM CDT, 2 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1118 AM CDT MON MAY 17 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1017 AM FLASH FLOOD PINELAND 31.25N 93.97W
05/17/2021 SABINE TX BROADCAST MEDIA
SOME ROADS AND AREAS IN SABINE COUNTY ARE
EXPERIENCING FLOODING: HIGHWAY 87 S
YELLOWPINE AREA 96 IN BROOKELAND HIGHWAY 21
TO NACOGDOCHES ANGELINA RIVER.
&&
25Special weather statement, May 17, 12:13 PM CDT, 1 hour 43 minutes before
Special Weather Statement
National Weather Service Shreveport LA
1213 PM CDT Mon May 17 2021
LAZ001-010-017-TXZ151>153-166-171800-
De Soto LA-Caddo LA-Sabine LA-Panola TX-Nacogdoches TX-
San Augustine TX-Shelby TX-
1213 PM CDT Mon May 17 2021
...SIGNIFICANT WEATHER ADVISORY FOR DE SOTO...SOUTHWESTERN CADDO AND
NORTHWESTERN SABINE PARISHES...SOUTHEASTERN PANOLA...EAST CENTRAL
NACOGDOCHES...SHELBY AND NORTHERN SAN AUGUSTINE COUNTIES UNTIL 100 PM
CDT...
At 1213 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles south of Deberry to 8 miles northwest
of Joaquin to near Tenaha to 6 miles northeast of Martinsville to
Melrose. Movement was east at 25 mph.
Winds in excess of 40 mph will be possible with these storms.
Locations impacted include...
Center, Mansfield, San Augustine, Stonewall, Logansport, Tenaha,
Joaquin, Melrose, Patroon, Martinsville, Bland Lake, Neuville,
Shelbyville, Chireno, Huxley, South Mansfield, Keachi, Grand Cane,
Longstreet and Stanley.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3154 9457 3169 9438 3189 9424 3206 9419
3227 9426 3230 9374 3201 9364 3185 9369
3165 9383 3160 9389 3157 9398 3152 9398
3144 9408
TIME...MOT...LOC 1713Z 275DEG 21KT 3220 9420 3206 9414 3189 9420 3169
9433 3159 9446
13Special weather statement, May 17, 1:02 PM CDT, 54 minutes before
Special Weather Statement
National Weather Service Shreveport LA
102 PM CDT Mon May 17 2021
LAZ001-002-010>012-017-018-TXZ153-166-167-171845-
De Soto LA-Bossier LA-Bienville LA-Natchitoches LA-Red River LA-
Caddo LA-Sabine LA-Sabine TX-San Augustine TX-Shelby TX-
102 PM CDT Mon May 17 2021
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN DE SOTO...RED RIVER...
WEST CENTRAL NATCHITOCHES...SOUTHEASTERN CADDO...SOUTHWESTERN
BIENVILLE...SOUTHEASTERN BOSSIER AND SABINE PARISHES...SOUTHEASTERN
SHELBY...EAST CENTRAL SAN AUGUSTINE AND SABINE COUNTIES UNTIL 145 PM
CDT...
At 102 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 7 miles northeast of Stonewall to 6 miles
northwest of Converse to 8 miles southeast of Patroon to 6 miles
southeast of Macune. Movement was east at 35 mph.
Wind gusts up to 50 mph will be possible with these storms.
Locations impacted include...
Shreveport, Mansfield, Milam, Many, Coushatta, Zwolle, Ringgold,
Hemphill, Converse, Rosevine, Oak Grove, Pleasant Hill, Florien,
Martin, Huxley, South Mansfield, Hall Summit, Noble, Fisher and
Edgefield.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3129 9418 3153 9395 3182 9383 3239 9372
3242 9344 3241 9324 3243 9324 3244 9317
3181 9329 3152 9339 3122 9368
TIME...MOT...LOC 1802Z 274DEG 30KT 3232 9371 3182 9380 3154 9392 3135
9410
13The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 8:47 PM CDT | River Flood Warning | SHV | Franklin, Morris, Red River, Titus | 20 days |
| May 16, 8:48 PM CDT | River Flood Warning | SHV | Wood | 7 days |
| May 16, 8:50 PM CDT | River Flood Warning | SHV | Franklin, Morris, Titus | 21 days |
| May 17, 4:34 AM CDT | Areal Flood Advisory | SHV | Sabine, San Augustine | 4 hr |
| May 17, 8:49 AM CDT | River Flood Warning | SHV | Gregg | 6 days |
| May 17, 8:54 AM CDT | River Flood Warning | SHV | Cass, Marion | 13 days |
| May 17, 8:56 AM CDT | River Flood Warning | SHV | Gregg, Harrison, Marion, Upshur | 10 days |
| May 17, 11:13 AM CDT | Areal Flood Warning | SHV | Angelina, Nacogdoches, Sabine, San Augustine, Shelby | 6 hr |
| May 17, 12:13 PM CDT | Special Weather Statement | SHV | Shelby | 47 min |
| May 17, 1:02 PM CDT | Special Weather Statement | SHV | Sabine | 43 min |
| May 17, 2:10 PM CDT | River Flood Warning | SHV | Panola, Shelby | 5 days |
| May 17, 9:06 AM CDT | River Flood Warning | SHV | Bienville, Bossier, Red River, Webster | 29 hr |
| May 17, 1:59 PM CDT | Special Weather Statement | SHV | Bienville, Natchitoches, Winn | 61 min |
| May 17, 2:55 PM CDT | Special Weather Statement | SHV | Grant, Winn | 65 min |
Nearby
Flash Flood Watches in Texas, 2021Flash Flood Watches in Louisiana, 2021Flash Flood Watches in Arkansas, 2021Every flash flood watch in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.